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Finding the Fourth Proportional to 8,605.40, 12,909.06 and 2,759.96

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Solution

The fourth proportional to 8,605.40, 12,909.06 and 2,759.96 is: 4,140.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.40 : 12,909.06 = 2,759.96 : x
  2. Step 2: Convert to fraction form
    8,605.40/12,909.06 = 2,759.96/x
  3. Step 3: Cross multiply
    8,605.40x = 12,909.06 × 2,759.96
  4. Step 4: Simplify right side
    8,605.40x = 35,628,489.24
  5. Step 5: Solve for x
    x = 35,628,489.24/8,605.40
  6. Step 6: Final answer
    x = 4,140.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.